Photographing apparatus



Nov. 26, 1935.

G. C. BEIDLER PHOTOGRAPHING APPARATUS Filed April 4, 1934 5 Shee ts-Sheet 2 Nov. 26, 1935. c, BElDLER 2,021,884

PHOTOGRAPHING APPARATUS.

Filed April 4. 1934 5 sums-sheet 4 3 Geogge 6,3552%);

Nov. 26, 1935.

s. c. BE IDLER PHOTOGRAPHING APPARATUS Filed Api'il 4, 1954 5 Sheets-Sheet 5 v v isderived for rotating the base ring when the Patented Nov. 26, 1935 UNIT sures- ATEN OFFICE mmm 7 Rochester, N. Y.

Application m 4. m4, sum No. 119,905

. 11 Claims.

This invention relates to photographing apparatus and particularly to the so-called "Duplex" type of such apparatus which is intended for use in successively photographing the two sides of film.

It is an object of this invention to provide an exposing chamber comprising arotatable framelike member and a stationary sheath or casing ,enclosing the same. except for a space through which light can be projected to the interior of the chamber, and to film which is located transversely thereof.

It is a further object of this invention to simplify the structure of photographing apparatus intended for use in photographing duplex film and. to that end, the rotatable frame has a top plate with a flange having an annular groove 'and a base ring having an annular groove corresponding to the annular groove of the flange of the top plate in which the casing has a light ight Joint with the frame. V

, It is an object of this invention furthermore" to provide novel means for rotatably supporting the base ring whereby friction is eflectively'reduced, as compared with known methods of mounting a rotatable element.

It is a further object of this invention to provide a novel film maguine in association with the top plate and ,means associated therewith for mounting the magazine on the top plate.

It is a still further object-of this invention to provide novel means for communicating power .or motion to the base ring and for turning the said base ring in opposite directions through approximately 180, novel means being provided for controlling the driving means through the actuation of exposure controlling means.

It is another object of this invention to provide switch actuating devices for. opening and closing circuits for a motor from which power base ring has been rotated to locations near the limit of'the 180' cycle.

Itds furthermore an object of this invention to provide a curtain for guarding the exposure open ing and to provide novel curtain operating mea and arresting meanstherefor when the curtain" is atthe limit of its elevated or-lowered positions. a

It is-a still further obiect M this'invention to provide a novel. rack associated with the base ring and with motor driven means for imparting the alternate rotary motion to the base ring. With the foregoing and other objects in view, the invention consists in the details of construcontheline 2-2ofFig.1;

shutter operating lever and reversing switch;

tion and in the arrangement and combination ofpartstobehereinaftermorefullysetforthandj In describing the invention in detail, reference will be hadto the accomp nyin drawings form- :5 ing part of this application, wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a view in side elevation of a photographing apparatus the inven- 10 tion; v Figure z'illustrates an enlarged sectional view Figure 3 illustrates a sectional view of parts of the apparatus on the line corresponding with 18 thelineHofFigJ; "j

Figure 4 illustrates'a view in elevationof those portions of the film feeding and cuttinginstrumentalities located externally of the casing;

Figure 5 illustrates asectionaiview on the line Figure 6 illustrates a sectional view on the line l-C of Fig. 2;

' 7 illustrates an enlarged sectional view of the dial mounting on the line 1-1 of Fig. 4; 25.

iI-II of Fig. 1, omitting parts above the casing! Figure 13 illustrates a sectional viewon the line iS-il of Fig. 12;

Figure 14 illustrates an enlarged detail view,

partly in elevation and partly in section, on the line ll-il-of Fig. 2; v

Figure 15 illustrates an enlarged detail eleva-' tion-of the hinge for the magazine cover;

Figure 1e fllustrates a sectional view on the 5 line lO-IC of Fig. 15;

Figure 17 illustrates a diagrammatic view of the electric system;

Figure 18 illustrates a view in elevation of the so figure Iiliilustrates a side view thereof; Figure 20 illustrates a sectional view on the linen-2| of Fig. 19;

" 1"igure2lillustratesarearviewofthemaga-' zineshowninFlg.l9;

Figure 22 illustrates a section 2222 of Fig. '19;

Figure 23 illustrates a section 23-23 of Fig. 19;

Figure 24 illustrates a section 24-24 of Fig. 19; and

Figure 25 illustrates a section 25-45 of Fig. 2-1. a I The photographing apparatus may have a light projecting instrumentality including a prism 30, a lens 3|, a bellows 32, and other characteristic features of such devices, but since they do not form a part of the present invention, except as they contribute to the projection of light, they will not be described in detail.

The bellows is in light tight connection with a camera body 33 and there is a rectangular on the line on the line the line the line housing 34 between the camera body and the' exposing chamber or that portion of the appa-. ratus which contains the film. The parts 33 and 34 are more or less conventional in devices of this type, but the sides of the housing 34 have guides 35 in'which a curtain may be lowered or raised. When the curtain is lowered, it is effective to protect him within the exposing chamber against the entrance of light thereto. In the present embodiment of the invention relating to the curtain, a shaft 35 is journaled in the sides of the housing and it projects at one end. A crank 31 on the said shaft is a means provided for rotating the shaft in opposite directo maintain the curtain in proper position when it is lowered, its edge is provided with a weight 33 which moves in the guides 35 as the curtainis manipulated. As a meansfor indicating when the curtain is in a wound or Lmwound state, the shaft is provided with threads 43 which engage the threads of a nut 4|. The rotation of the nut is restrained by reason of the presence of a flange 42 of a plate 43, which plate is secured to the inner surface of the housing. The nut has a recess which constitutes a blearance for the flange,but the shoulders 44 or 45 of the nut will engage the flange and prevent rotation of the nut while it is being moved under the influence of the screw. When the screw has-reached a'predetermined position where the curtainis' at its extreme of adjustments, the nut will engage one of the abutments 46 or 41 and arrest 'the shaft, on which occurrence the operator will know that the curtain is in the position so indicated.

The base 48 has a plurality of anti-friction bearings each of which is mounted on a stud 54 anchored in the base and projects into a recess 5! formed in the base 48 at the inner edge thereof. An outer ball race 52 has a groove for an anti-friction element 53 in its inner surface and an inner race 54. fltting on the stud 50, has a roove in its outer surface corresponding with the groove in the outer race. The upper surface 55 of the outer race is beveled or tapered toward its periphery and said upper surface constitutes a support for the flange 56 of a base ring 51. The base ring 51 and a top plate 43 are pro-' vided as parts of a rotatable frame, to be presently described, and what may be termed the front of the base ring and top plate is associated with the housing 34. Owing to the taper of the upper surface of the outer race, the area of the flange resting on the said race is restricted, resulting in a line contact; hence, friction due to the operation of the basering on the r swung to an open position where it is engaged bearing is minimized. In practice, three such bearings are employed, although the inventor does not wish to be limited with respect to this installation.

The upper edge of the base ring has an an- 5 nular channel 53 and the lower edge of the flange 59 of the top or cover plate has an annular channel 60. A sheathing or housing 6| has its edges seated in the annular channels 58 and 60, respectively, and posts or rods 62 hold the base ring and cover in spaced relation to each other and form a skeleton frame which rotates independently of the sheathing, as will presently appear.

The posts or rods have their lower ends anchored in appropriate way to the base ring as by threaded joints, welded joints, or the like, and the upper ends of said posts are reduced in diameter, as compared with the main portions of the posts, and the extremities are threaded. The shoulders that are formed by reducing the di- 20 ameter of the posts at the ends act as supports for the top plate and, when the nuts are threaded on the outer ends of the posts, the frame structure comprising the parts described is rigid and strong. 25 The cover plate has a slot 53 through which film from a magazine will be fed and the said magazine, in the present embodiment of the invention, includes a cover or housing 64 which is intended to support a spool containing the film. This housing is embraced at its lower edge by flanges 65 which are anchored'in appropriate way to the top plate 49, the said housing being hinged to one of the flanges so that it is capable of being and supported by a bracket 66 located on the housing 34, although this location may be changed to suit'particular requirements.

The housing 54 is oscillatable on flanges 55 by what may be termed half hinges", that is to say, each flange has a member 65 with its upper edge curved so that it has a convex outer surface 61 which is in spaced relation to a guard 63, which guard comprises a strip of metal having an outwardly bent central portion, and the 5 ends of the strip of metal are secured to the flange. Flanges, such as the flange 69, of a plate '10 secured to the magazine are complemental in shape to the convex surface 61 and ride thereover when the magazine is swung ,to an open 50 position. The end of the flange 69 passes partially around the surface 61 and extends into the space inside the guard 68, in which position the magazine cannot be lifted free .of the flanges.

When, however, the magazine is in the position 55 where the flanges 62 are at the top of the convex surfaces 61, the magazine cover may be lifted. The magazine cover is latched in its closed position so that it will not he accidentally dislodged and, to that end, the inner surface of w the said cover has a recess II in which a spring pressed latch 12 is lodged. The structural features of the latch and cover at the location just mentioned is shown in Figure 11 and it is believed .unnecessary to describe the latch in detail, as it is comprehensively illustrated.

sperm ers need not, it is thought, be described In detailsince the subject matter thereof is described and claimed in acompanion application, of this applicant, Serial No. 662,337, filed March 23, 1933, (U. S. Letters Patent No. 1,976,156 dated October 9, 1934). It will be sufficient for an understanding of this apparatus to say that the feeding rollers 19 and Il are associated with a knife blade -15 which is stationary, except for a slight upward movement imparted to it during the cutting operation; thesaid upward movement being provided by the clearance or slot 16 in the end plates which carry the knife. The blade 'II which actswith the blade I has its endsattached to plates such as I8, each having a segmental slot l9 constituting a clearance for the shaft of the roller I4, and when the cutting mechanism is operated, the plates I9 oscillate to carry the blade 11 .into engagement with the.blade I5. The plate I8 is further provided with peripheral teeth which are engaged by a pinion 8| on a shaft 92. Enough has been disclosed of the cutting mech anism, it is believed, for an understanding of the invention, and since it is possible to substitute other well'known cutting mechanisms for those of the disclosure, no'point of patentability as to this cutting mechanism is made in this application.

The base ring is enclosed at the bottom by a plate 85 having a slot 86 through which film is discharged in the usual way. In order to protect the interior of the exposing chammr from light, light guards 91 and 98 are associated with the cutting and drawing mechanism, as fully shown, and each has a base portion such as 89 secured to the plate 85 in any appropriate manner, as by screws 90.

As a convenient means for operating the drawing rollers in association with a base ring of this character, a housing 9| is provided and the said housing is carried by a metal block 92 whose 'ends form shoulders 93 and 94. A shaft 95 is between the 'gear wheel 91' and'a pinion 98 on a shaft 99, which shaft 99 has a crank I", by which the feed rollers are driven.'

A disk IIII has a hub I02 which is recessed to receive a spring I03, the said hubbeing mounted on a screw I which is threaded in the end of a shaft I05. By this means the disk is frictionally held at different positions of adjustment and the outer surface of thedisk is graduated so that as theshaft I95 is rotated, the disk will turn and the graduations are intended to indicate the length of film drawn into the exposing chamber by the turning of the crank IIIII and the operation of the feeding rollers. A gear wheel I rotates with the shaft I05 and it meshes with a pinion It! on an extension of the shaft 96. Hence, as the drawing or feeding rollers are rotated, the wheel I06 with thedisk III is rotated, bringing the graduations successively into regis- I try with an indicator I99 which is fastened to the block 92, as shown in Fig. 2.

Asa'meansforturningthefllminthe eipoalng chamber, the'frame comprising the base ring, cover or top and the posts connecting these elements is motor driven, and means of communi-r,

' eating the power from the motor to the frame includes a worm I99 on the motor shaft Ill whichmesheswithawormwheel III on ashaft m thatis journaled in bearings m and In withinthecasing. Thepartofthe casingto whichthebearingsareattachedmaybes changed to suit particular requirements and need not, it is thought, be described in detail. The shaft is provided with a collar 5 which supports a friction disk II! that is engaged by a gear wheel II'I rotatable on the said shaft H2. Another friction disk III engages the upper surface of the gear wheel II I and is pressed thereagainst by aspring II9 encircling the shaft H2 and interposed between the bearing Ill and the said friction disk 8. By this means the wheel I" is'made to rotate with the shaft II2, although the wheel I" may remain stationary when resistance to its motion overcomes the friction of the disk, since thereis what may be termed an over-run" of the driving means, due to its momentum at about the time of -the arrest of the film carrying frame and after the motor is deenergiaed.

The base ring near its lower edge is provided witha circumferential slot I29 inwhich a rack I2 I is located and the gear wheel I" engages an idler III which in turn engages the rack and when in motion turns the base ring and the frame ofwhichitisapart.

The motor for driving the shaft III! is of a.30

type which drives alternately in opposite directions and, as a means for controlling current to I the poles of the motor, a snap switch is provided that is actuated by a member on the rotatable ing it in the opposite direction, and a switchblade m connects the switches in an I23 for one of the circuits and the switches I24 and I25 for the other circuits. Thus, when the motor is operating to rotate the frame in. one direc-- tion, the circuits through ,the switches are closed and 'just'before the frame reaches the limit of its movement in,the aforesaid direction, an

abutment I21 on the frame'strikes the side of the end In of the lever m and throws the lever until the outer end of the rod I30, which is under the influence of aspring I31, as shown, passes the axis of the pivot I32 of the switch blade I23 and the axis of'the pivot I93 of the lever I29. The action of the spring then causes the switch blade to be transferred to the other switches I22 and I23 and when the circuit is energized, the motor will be driven in the direction opposite to that-in which it'was driven when the switch was in the first mentioned pofltion.

The circuit through the switches just described iscompleted, however, through the manipulation of'a switch which is under the control of a lever, to be presently explained, by which the shutter of the lens is operated.

As to this last mentioned feature of the invention, the handle or crank III is rotatable on ashaftlii Journaled in a bearing I36 located externally of the casing. A bracket I31 is also secured to the casing in proximity to the shaft 70 and it carries a meter I99, of known type, consisting of disks with peripheral numbers, and it is the purpose of the inventor that the meter shall be operated when the shutter is operated for the exposure so that the meter will indicate 75 the number of exposures that have been made. To this end, an arm I39 extends downwardly from the meter casing, and each time the crank I34 is moved to open the shutter, a cam I46, which forms a part of or is otherwise associated to move with it, contacts the depending arm I38 and swings it to a degree that the numbering of the meter is advanced one point.

A stud I4I acts as an abutment for limiting the motion of the crank I34 in one direction and a spring latch I42 on the stud engages the crank and frictionally retains it against movement until it is again manually operated.

'As stated, the crank is freely rotatable on the shaft I35, and the said shaft has a ratchet wheel I43 secured to it, which is engaged by a springpressed ratchet I44 pivoted on a lug I45 integral with the crank I34. When the crank I34 is moved away from the latch I42, the shutter-opcrating wire I46 opens the shutter for exposing film. After a predetermined period of time, the shutter is closed and the crank I34- is returned to engage the latch. During this movement, the ratchet wheel is turned and hence, the shaft I35 is turned. The inner end of the shaft I35 is anchored to a switch block I41 and the switch block is given an intermittent step by step rotation, for a purpose to be presently explained, but it mry be stated in a general way that through this control of the switch the circuits to the motor are established or interrupted in order that the motor will be energized as soon as the crank has been returned to inactive position after the exposure has been made, the motor being again energized upon the operation of the crank I34 on the completion of the next exposure,but in this last cycle of operation, the motor is energizecl to move the film carrier in a direction opposite that in which it was moved in the first occurrence.

What has been referred to as the housing in-. cludes hollow side members constructed of sheet metal, such as identified by the reference numeral I48, and a flange, such as I 48, of the sheath is secured to each of the side members. Plates or cleats I50 are secured to the side members and form anchorages for a frame-like light shield I50 which is interposed between the top and the base ring. The structure of this" frame may be changed but, in the present embodiment, it is composed of side, top and bottom members which close the space between the frame and the curtain or the curtain guide. The upper member of the frame has a curved flange I5I which fit s in that portion of the annular groove that is not occupied by the sheath, and the lower portion of the frame has a flange I 52 which fits in that portion of the groove of the base ring not occupied by the sheath.

In order to clarify the operation of the reversing motor and of the switches illustrated in Figurev 10 and in Figures 18 to 25 inclusive, reference will now be had to the wiring diagram shown in Figure 17. In this figure there is showna pair of conductors I53 and I54 receiving current from any suitable source of supply, the wire or conductor I54 being shown as the positive wire while the conductor.- I53 is shown as the negative wire. The wire I54 is connected to the brush I6I and i this brush is connected by a conductor :10 with the brush I 65. The contacts I22 and I2 0'! the circuit breaker are connected in multiple to the wire |53.- The contact m of the circuit breaker is connected by a wire I55 with the brush I88 and V the contact I24 is similarly connected by a wire I56 with the brush I58. Extending along the cylinder lfl at diametrically opposite positions are contact bars "I and I12 which, for diagrammatic purposes, have been illustrated as separate contacts HI and separate contacts I12, the sepa- 5 having wiring connec I in Figures 19 to 25. The conductor I58 is disclosed in the diagram as having contact ends I58 and-the conductor I 59 is similarly described as connecting the strips or bars "I and I12. The brushes I 64 and I63 are connected by a conductor I13 and the brushes I68 and I66 are connected by a conductor I14.

As shown in the diagram, the reversing switch is in one open position. This will be understood by observing that a partial circuit'may be traced 20 from the wire I54 through brush I6I, contact I58, conductor I58, contact I58 and conductor I14 to brush I66 which, in this position of the switch,

- rests on the insulating cylinder 1.. At the same time the armature winding of motor I51 which is connected to brush I by a conductor I15 and to brush I65 by a conductor I16 is short circuited, since a circuit exists from conductor I54 through brush I6I, conductor I10, brush I65, conductor I16, armature I51, conductor I15, 'brush I60, contact I58, conductor I58, contact I58, brush I6I and back to conductor I54. Obviously under these conditions no current will flow and the motor will not operate.

If new, the cylinder I 41 be rotated 90 by the action of the arm or lever I34, then the following condition obtains. Current will flow from conductor I54 through brush I6I, conductor I10, conductor I16, armature I51, conductor I15, conductor I14, brush I66, contact I12, conductor 'I12, contact I12, brush I68, conductor I 55; contact I23, bar I28, contact I 22, and thus to conductor I53. At the same time a branch circuit will be established from conductor I15 through conductor I11, field winding I51 conductor I18, .brush 45 I 61, contact I12, conductor I 58, contact l1I, conductor I1I', contact I" to brush I66; anllthus as before to the negative wire I53. The course of these circuits is indicated by arrow heads on the conductors I15, I16, I11 and I18. The motor 50 new in a reverse direction through the winding I51" so that the direction of rotation of the motor will be reversed and the rotating parts of the machine will rotate in the opposite direction to that just described and the rotation will continue 85 until the other stop I 21 trips the cut out switch.

I While the means for supplying currentv to the motor has been illustrated and described in detail, it is obvious that other well known circuits.

and controls may be substituted therefor which 70 are capable of operating fully stated herein.

I claim:

1. In a photographing apparatus, means for in produce the results projecting light. a film carried rotatablymount armature winding but will 60 V ed in operative relation. to the means for projecting light, said carrier comprising a frame, means. associated therewith for drawing film therethrough, and stationary means enclosing the frame for maintaining the frame in light-proof association withthe means for projecting light, the said stationary means having an opening through which light is projected to film on the film carrier.

2. In a photographing apparatus, means for projecting light, a film. carrying frame rotatably mounted in operative relation to the said projecting means, means with relation to which the frame is movable forming therewith an exposing chamber, means for rotating the frame, a reversing switch for controlling current, means movable with the frame for tripping the reversing switch, electrically driven means, means for transmitting the drive of the last mentioncd means to the frame, an electric circuit including a source of electricity, the reversing switch, a mariually controlled switch and the electrically driven means, whereby power is communicated to the frame for turning it alternately in opposite directions.

3. In a photographing apparatus, a rotatably mounted frame comprising a base ring, posts and an apertured top plate, a stationary sheathing partially enclosing the side of the frame and therewith forming an exposing chamber, a light and image projecting instrumentality in' oper ative relationto the exposing chamber, a film holder on the plate from which film is projected into the exposing chamber, means for drawing film through the exposing chamber, means for.

' turning the film alternately in oppositedirections,

and means for controlling the last mentioned means. I 4. In a photographing apparatus, a rotatably ounted frame comprising a base ring, postsand an apertured top plate, a stationary sheathing between the base ring and top plate partially enclosing the side of the frame and therewith forming an exposing chamber, a light and image projecting instrumentality in operative relation to the exposing chamber, a film holder on the plate from which film is projected into the exposing chamber, means for drawing said film through the exposing chamber, means for'turning the frame in one direction from a normal position, and means for returning; the frame to its normal positions 5. In a photographing apparatus, a rotatably mounted frame comprising a base ring,.posts and an apertured' top plate, a stationary sheathing partially enclosing the side of the frameand therewith forming an exposing chamber, a light and image projecting instrumentality in operative relation to the exposing chamber, a film holder on the plate from which film is projected into the exposing chamber, means for drawing said film through the exposing chamber, a reversing motor for turning the frame alternately in opposite directions, means for controlling current to the motor including an exposure controlling device, means for controlling the rotatable frame, and means actuated by the rotating frame for reversing the circuit to the motor.

6. In a photographing apparatus, a rotatably mounted frame comprising-a base ring and a slotted top plate,"posts holding said frame and base ring assembled, a sheathinglpartially enclosing the, side of the frame, a light and image projectingmeans communicating with the interior of the frame through the opening unguardtravels, said anti-friction elements each compris-' ing a horizontally rotatable ball race having a 5 beveled upper surface engaged by the base ring, an inner ball race coacting with the first mentioned ball race, and a stud supported by the base to which the second mentioned ball race is applied and by which it is supported. .10 7. In a photographing apparatus, a film supporting frame having means for drawing film therethrough and means for cutting the film, a light projecting instrumentality and a sheathing form ng withthe said frame a light-proof ex- 15 posing chamber with which the light projecting means communicates, anti-friction elements on which the frame rotates, each of said anti-friction elements comprising a horizontally rotatable ball race for supporting the frame, an inner ball go race with which the outer ball race coacts, and

. a suitably supported stud to which the inner ball race is applied and by which it is supported.

8. In a photographing apparatus, a frame having means for drawing film therethrougli and 5 means for cutting the film, alight projecting means, means for maintaining the interior of the framein light-proof on with the I light projecting means, means for rotatably supporting the frame comprising anti-friction ele- 3o ments, each of which comprises an innerball race, a vertically positioned stud on which the inner ball race is mounted, and an outer ball race coacting with the inner ball race rotatable horizontally, the outer ball "race having a beveled s5 frame supporting surface whereby the said frame is in line contact with the ball race.

9. In a photographing apparatus, a rotatable film holder, means for operating a shutter of the photographing apparatus, aswitch, means op-"m erated by the said means when 'moved to close said shutter for operating the switch and closing a circuit to a motor, means for communicat: ing power from the motor to rotate the film holder, and a switch tripped by the filmholder for opening said circuit.

10. In a photographing apparatus, a rotatable film holder, a light projecting means in operative relation to said holder, means for'operating a shutter of the light projecting means, a motor including an electric circuit, means whereby the motor rotates the film holder, a switch in said electric cirouit operative to make and break the motor circuit and to establish said circuit when the shutter operating means is moved. 65 to close the shutter.

11. A magazine comprising a suitably supported frame, a housing, interengaging half hinges supported by the housing and frame whereby the said housing may be swung to openthe magazine, the said hinge sections being operative to prevent dislodgment of, the housing vertically from the frame and to permit disconnection-of .the housing and frame when said housing is tion and extendible into the housing between the curved portion of the first mentioned memher and the outer wall of the housing. 13. A magazine'comprising a suitably supported frame and a housing, hinge guards applied to the frame, hinge elements, one of which is located in each guard, said hinge elements having convexed portions elevated above the guard but terminating inside the guard in spaced relation to the outer wall of said guard, a member secured to the housing having a curved portion complemental to the curved portion of the first mentioned hinge member movable on said curved portion and extendible into the housing between the curved portion of the first mentioned member and the outer wall of the housing, and a latch associated with the frame and engaging the housing for retaining the housing closed;

14. A camera having an exposing chamber and light admitting means, a film holder rotatably mounted in the exposing chamber in position to expose the sides of film successively to light, film' drawing means and film cutting means carried by the holder, motor driven means for imparting rotary motion to the said film holder in one direction, including means for imparting rotary motion to the film holder in the opposite direction after the first mentioned rotary motion has ceased, means for operating the film drawing means, and means for operating the film cutting means, the last mentioned means for operating the film drawing means and for operating the film cutting means being in stationary position with relation'to the film holder.

15. A camera having an exposing chamber and light admitting means, a film holder rotatably mounted in theexposing chamber in position to expose the sides of film successively to light, film drawing means'and film cutting means carried by the holder, a reversible motor, means whereby the motor imparts rotary motion to the said film holder in one direction, means for interrupting current V to the motor when predetermined movement is imparted to the film holder, means for reversing the current in the motor to drive it oppositely and impart rotary motion to the film holder in the mounted in the exposing chamber in position to m expose the sides of film successively to light, film drawing means and film cutting means carried by the holder, a reversible motor, means whereby the motor imparts rotary motion to the said film holder in one direction, a current reversing switch 1 for the motor, means actuated in time with the movement of the film holder for operating the reversing switch at cycles of operation of the said film holder, means for interrupting current to the motor when predetermined movement is 20 imparted to the film holder, means for reversing the current in the motor to drive it oppositely and impart rotary motion to the film holder in the opposite direction, means for switching current of the motor'when the holder has returned to its 2 initial position, and means stationary with relation to the moving film holder for operating the film drawing means and the film cutting means in succession.

17. In a photographing apparatus, means for 3 projecting light, a film carrier rotatably mounted in operative relation to the means for projecting light, said carrier comprising a frame, means associated therewith for drawing film therethrough, motor driven means for partially rotating the 3 film carrier alternately in opposite directions to present first one side and then the others'ide of the film to the projected light, and stationary means enclosing the frame for maintaining the frame in light-proof association with the means 40 GEORGE c. BEIDLER. 4 

